The most sophisticated LED light bars have LED drivers that use
Pulse Width Modulation to control LED current. There are also
available external PWM units that effectively do the same thing for
LED light bars without built-in PWM.

A PWM adjusts the energy frequency applied to the LED. It turns the
LED off and on at a high, controlled rate within milliseconds. The
rate is well above what the human eye can detect, so there is no
flickering effect. This technology offers several benefits:

LEDs do not overheat even at 100 percent capacity.

LED lifespan is increased.

With an external control, you can dim or strobe the light bar.

Amperage draw is reduced overall

It adds protection against voltage spikes from vehicle electrical
systems.

For LED light bars, brightness is expressed in lumens. Measuring
lamps in watts became obsolete when different lighting technologies
came to market. The lumen indicates how much human visible light a
device outputs. However, some light bar makers list their lights in
raw lumens, which is the theoretical maximum, instead of effective
lumens, which is a true measure of light output. A rule of thumb is
to convert raw lumens to effective lumens by multiplying the former
by 0.8.

All 12V /24V Cars are suitbale.

About TRUTEC:

Trutec Auto Think, a mature enterprise, must take product quality
as the cornerstone, with good faith and mutual benefit as the
bridge, with sincere after-sales service as guarantee. Vehicle
lighting products are not only for the sake of beauty and
domineering, but also to ensure night driving and night operation
safety. Road lights have been certified by CE, ROSH, IP67 and other
European standards, exported to the European Union, Southeast Asia,
Africa, South America, more than 30 countries. TrutecLED will be
your reliable supplier .